Some of music’s biggest stars will stand alongside many of today’s beautiful models for the 2012 Victoria’s Secret Fashion Show. Airing on December 4th at 10 p.m. EST on CBS, the hour-long spectacle will feature performances from Rihanna, Justin Bieber and Bruno Mars announced today. It’s still to be determined as to Bieber’s choice of song, fans can expect Rihanna to perform “Diamonds,” with Bruno Mars selecting his new released single “Locked Out of Heaven.”